This is my attempt at replicating the new iPhone 6s' '3D Touch' on Android.
You can 'peak' by softly touching and holding on an item to get a little detail. Keep pressing a little harder and 'pop' to the full detail of the item. If you don't want to go to the detail release your finger. You can also just tap on the item to go to the detail as normal.
This is very much a work in progress. I have only tested it on my Nexus 5 so on any other phone, your milage may vary.
All feedback welcome.
